Hitachi VSP User and Reference Guide
3–12
System Components
Flash RAID configurations
As described in the previous section, RAID configurations with FMDs are
similar to RAID configurations for disk or flash drives. When configuring
RAID groups, consider the cluster of four flash boxes in the FBX as a set.
Just as the RAID group number is determined according to the location of a
disk drive, the RAID group number is also determined by the location of a
flash module in a flash chassis, even though the number of FMDs is smaller
than the number of drives in a drive chassis. This is because the VSP is
capable of variable numbers of drives in a drive chassis. The following
illustration shows two samples of RAID configurations with flash modules.
Figure 3-10 Flash RAID configurations
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